From 6bba2b73d730cd63b5518ac95a8ec077d3e609a4 Mon Sep 17 00:00:00 2001
From: vivganes <caliberoviv@gmail.com>
Date: Wed, 13 Aug 2025 04:47:33 +0530
Subject: [PATCH] fix #222

---
 internal/coverage/profile.go  | 7 +++++++
 internal/engine/stubs_test.go | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/internal/coverage/profile.go b/internal/coverage/profile.go
index 39438859..0ef06ec9 100644
--- a/internal/coverage/profile.go
+++ b/internal/coverage/profile.go
@@ -18,6 +18,8 @@ package coverage
 
 import (
 	"go/token"
+	"os"
+	"strings"
 )
 
 // Profile is implemented as a map holding a slice of Block per each filename.
@@ -25,6 +27,11 @@ type Profile map[string][]Block
 
 // IsCovered checks if the given token.Position is covered by the coverage Profile.
 func (p Profile) IsCovered(pos token.Position) bool {
+	// normalise path separators
+	if strings.ContainsRune(pos.Filename, '/') {
+		pos.Filename = strings.ReplaceAll(pos.Filename, "/", string(os.PathSeparator))
+	}
+
 	blocks, ok := p[pos.Filename]
 	if !ok {
 		return false
diff --git a/internal/engine/stubs_test.go b/internal/engine/stubs_test.go
index ff7c775e..7ed77b7f 100644
--- a/internal/engine/stubs_test.go
+++ b/internal/engine/stubs_test.go
@@ -72,6 +72,8 @@ func loadFixture(fixture, fromPackage string) (fstest.MapFS, gomodule.GoModule,
 }
 
 func filenameFromFixture(fix string) string {
+	// Replace the path separator with the OS specific one.
+	fix = strings.ReplaceAll(fix, "/", string(os.PathSeparator))
 	return strings.ReplaceAll(fix, "_go", ".go")
 }